Emmett is lifting a box vertically. The forces that are necessary for calculating the total force is Fp and Fg. The correct option is D.
Force is an influence or strength that is used to initiate an action or movement. There are total eight types of forces are present.
Fp is the applied force and Fg is the force of gravitation, if Emmett is lifting a box vertically, these force will be applied
Thus, the correct option is D, Fp and Fg.
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